fixes pytest-dev#1210 adds stderr write for pytest.exit(msg) call

Author: doomb0t

_pytest/main.py

@@ -90,7 +90,8 @@ def wrap_session(config, doit):
             session.exitstatus = doit(config, session) or 0
         except pytest.UsageError:
             raise
-        except KeyboardInterrupt:
+        except KeyboardInterrupt as e:
+            sys.stderr.write('{0}: {1}\n'.format(type(e).__name__, e.msg))
             excinfo = _pytest._code.ExceptionInfo()
             config.hook.pytest_keyboard_interrupt(excinfo=excinfo)
             session.exitstatus = EXIT_INTERRUPTED

testing/test_runner.py

@@ -457,6 +457,18 @@ def test_pytest_fail():
         s = excinfo.exconly(tryshort=True)
         assert s.startswith("Failed")
 
+def test_pytest_exit_msg(testdir):
+    testdir.makeconftest("""
+    import pytest
+
+    def pytest_configure(config):
+        pytest.exit('oh noes')
+    """)
+    result = testdir.runpytest()
+    result.stderr.fnmatch_lines([
+        "Exit: oh noes",
+    ])
+
 def test_pytest_fail_notrace(testdir):
     testdir.makepyfile("""
         import pytest